EFFECTS OF SEXUAL REPRODUCTION. 247 



divisions, and in these divisions each cell divides its entire struc- 

 ture into two equal halves so that each half contains all of the 

 original elements in the same proportions which they were con- 

 tained in the original cell. If we assume that a cell prior to divi- 

 sion is a certain individual, and after division one of its halves is 

 the same individual, then, in the process of division, this individual 

 is subjected to conditions of waste similar to those in an adult, and 

 this waste must be repaired by the addition of new material. The 

 material for this repair is furnished by the adult individual within 

 which the germ cell is housed, and this material is furnished to the 

 cell in the condition in which the adult is furnished it for its own 

 use. As the adult is furnishing material for the repair of all of its 

 own organs at the time when it is called upon to repair the elements 

 of these organs in the cell, and as the functional condition of the 

 repairing material is determined by the functional activity of the 

 adult organs to be repaired, the repairing organs included, it is 

 evident that the repaired part of the cell is built up of material 

 having the functional capacity demanded by the functional activity 

 of the adult organs. The original part of the cell has its material 

 of a functional capacity corresponding to conditions as they existed 

 at previous periods of repair, and as the new material is not set off 

 or separated from the older material but is intimately united with it, 

 the functional condition of the material of a cell is a compound of 

 a series of conditions extending an indefinite distance into the past, 

 the potency of which conditions is proportional to their nearness to 

 the present. 



HABITS OF ORGANS. 



This resulting condition of the cell is, however, somewhat modi- 

 fied by what in different departments of science we call inertia, 

 persistency of force, stability of a compound, habit, memory. These 



